Method and apparatus for cutting webs



Jan. 12, 1943. p, KoRsGAARD 2,307,889

METHOD AND APPARATUS FOR CUTTING WEBS Filed Aug. 15, 1941 3 Sheets-Sheet l Zinnmtor PAUL KORSGAARZD Jan. 12, 1943. p, KORSGAARD 2,397,889

METHOD AND APPARATUS FOR CUTTING WEBS I Filed Aug. 13, 1941 s Sheets-Sheet 2 PAUL Koas GMRD lhmentor (Ittomeg Patented Jan. 12, 1943 UNITED STATES PATENT ()FFICE Paul Korsgaard, Chicago, Ill., assignor to Johnson & Johnson, New Brunswick, N. J., a corporation of New Jersey Application August 13, 1941, Serial No. 406,643

22 Claims.

This invention relates to the manufacture of filter discs and more particularly those manufactured from thin tenuous sheets of material.

Filter discs of this type are used extensively in the processing of milk where discs of thin webs of carded cotton are employed. In some instances these carded webs of cotton are faced on one side With a disc of gauze, in other instances they are faced on both sides with discs of gauze, and in still other instances the carded Webs are used without fabric reinforcings.

It has been the practice in the past to die-out or punch these discs from a strip of material either by punching a single disc at a time, or by punching a plurality of discs at one time with a multiple die head. In the latter instance, it also has been customary to stack a plurality of cut sheets of web together and punch through these stacked sheets with a multiple die head. The foregoing procedures, however, are unsatisfactory, i. e., when a single disc is being punched and when plurality of discs are being punched because even in the latter procedure it is necessary first to stack the multiple piles of webs, align them properly under the die head, cause the die head to puncture through the stacked sheets,and then remove both the cut discs and the remainder of the web, and repeat this procedure for each successive stack of webs. Obviously such procedures are unecon-omical both as to cost and time consumed.

As is appreciated by those skilled in the art, many problems are involved in handling tenuous webs of material such as carded slivers of cotton and particularly in cutting clean-cut sections such as discs therefrom. The very filmy nature of the material makes it difficult to feed in a continuous manner and the structure of the sheets, that is, the fibrous character thereof makes it difficult to sever in a clean-cutmanner without drawing or dragging more or less fibers. This latter difliculty is particularly troublesome when it is attempted to cut discs from a continuously traveling web of filmy material such as a carded web of cotton or other cellulose fibers. The matter of retaining the web taut and properly supporting it while accurately and cleanly cutting and the carrying away of the scrap material presents even further problems particularly in a continuously operated machine.

It is the purpose of this invention to provide an improved method and machine for cutting filter discs from a continuous web of tenuous fibrous material such as a carded web of cotton in a continuous operation and in such a manner as to permit economical and efiicient manufacture of filter discs on a mass production scale as distinguished from piece operation.

Other objects and advantages will be apparent from the following description given in connection with the drawings in which:

Figure 1 is a schematic lay-out drawing illustrating the method and mechanisms used in manufacturing filter discs in accordance with this invention;

Figure 2 is a front elevation of a section of web illustrating the pattern or position of the cuts made by the several cutting dies;

Figure 3 is an end elevation of the die-out machine taken from the discharge end of the machine;

Figure 4 is a side elevation of the die-out machine partly in section and taken on three different planes, the better to illustrate certain interior portions thereof;

Figure 5 is an enlarged side elevation of the anvil for engaging the cutting die; and

Figure 6 is an end elevation of the same.

General operation Referring to the drawings, the general lay-out and method wiil first be described for a better understanding of the mechanisms involved. As illustrated in Figure 1, a web of cotton l, is illustrated as coming off a card machine 2, of any well known construction from which the web is passed through a starch mangle 3, and a drier 5, after which it is passed between a set of draw rolls 1, and then through a constant tension or take-up device 9, to the constant feed rolls H, for receiving the web at the upper end of the die-out machine. From the constant feed rolls H, the web is permitted to form a take-up loop as at l3, and is then fed to the upper of four sets or pairs of vertically arranged and intermittently rotated 'feed rolls l5, 15a, i511, and I50, and into a suction pipe H, which receives the remnant or scrap web after the discs have been cut therefrom, and transfers the scrap to a re-work machine (not shown). The loop [3 is necessary to accommodate the alternately taut and slack condition of the Web created in converting the continuous feed to an intermittent feed.

The change from continuous to intermittent feed is desirable because the web is initially formed and is passed through the starch, drying, and drawing apparatus and thereafter discharged in a continuous manner whereas due to the structural character of the Web, it is very difficult, if not impossible, to cut portions therefrom While Feeding mechanisms As previously stated, the carded web either with or without a fabric facing on one or both sides is guided by any suitable means from the constant tension take-up roll to the upper constant speed feed rolls I I, extending across the machine between the side plates IS. The upper feed roll H, is carried by the rear end of the arms I9, pivoted to the side plates, and is spring urged toward the lower roll journaled in the side plates 58, as illustrated in Figure 4. In order to permit separation of the two roils II, for insertion or release of the web, arms 59 may be rocked clockwise by the release mechanism 23, which actuates a pair of cams 25a to rock arm I 9 clock-wise (Fig. I) and raise the upper roll I I.

The rolls II, are geared together for positive rotation by gears 2i, and the lower feed roll is driven through the lower gear AI, carried upon one end of said roll and which engages a reversing gear 22, on a counter shaft 23, which latter gear in turn is driven by a chain 24, passing over a sprocket on shaft 23, and also over a sprocket 25, on the upper stripper cam shaft 26, also journaled in the side plates I8. Shaft 25, is in turn driven from the upper main cam shaft 21, by a chain 253. The upper cam shaft 2?, is journaled in bearings carried by the upper rear bolster plate 2d, and is driven through a gear so, secured to the shaft and which engages a gear 3!, carried by the lower main cam shaft 32, journaled in bearings carried by the lower rear bolster plate Both bolster plates 29 and 33, are supported by the side plates I3. Gear 3I, is driven by an intermediate gear 3A, which in turn is driven by gear 35, on a shaft 35, which in turn is driven through V-belt 3?, from the main motorized variable speed unit 38, also carried by the bolster plates 29 and 33. It will be understood that the foregoing train of driving mechanism is so selected that the various shafts and the continuous feed rolls are driven at the desired speeds.

As previously stated, the web which is received by the constant feed rolls Ii, is fed thereby to the first or upper set i5, of a series of four pairs of vertically arranged, intermittently driven feed rolls I5, I5a, I51), and I5c. Each pair of these rolls is arranged so that one roll may be moved away from the other to facilitate threading the web through the machine, and for relief in case of jams. Each pair is geared together on the left side of the machine, and powered on the right side, a reversing gear being employed to obtain the desired direction of rotation as will be explained hereafter. A take-up loop or slack is provided between the constantly driven rolls II, and the intermittently driven upper rolls I5, as previously stated.

In the case of the upper roll I5, the outer roll is themovabl roll and is supported by the free ends of arms ii pivoted on the side plates I8. The arms 6%, are spring urged counterclock-wise thus urging the rolls I5, together. The two rolls I5, are geared together by gears Ma (Fig. 3) and the inner roll of the upper rolls I5, i driven through gear 4|, which engages a reversing gear 42, on the stub shaft 42a. The latter shaft is driven by a chain 43, which engages a sprocket on the stub shaft 42a, and a sprocket on the outer roll of the adjacent lower pair of rolls I511, which rolls are also journaled in the side plates I8, and are geared together by gears similar to gear Ma. The inner roll of rolls Ia, is the movable roll and is supported by the free ends of arms 49a pivoted to the side plates I8, and spring urged counterclock-wise (Fig. 4.) to cause the rolls 55a to approach each other. The outer roll of the rolls I 5a, is driven by a chain ie, engaging a sprocket on the outer of rolls l5a and the outer of rolls l5b, the latter also being journaled in side plates I8. The rolls I5b, are geared together on the left side of the machine (Fig. 3) and the outer roll b, is driven by means later to be described. The inner roll of the pair of rolls IE1) is the movable roll of this pair and is supported by spring urged arms 4%, similar to arms Mia. The lowermost pair of rolls 150 are also geared together and the outer roll is driven from the outer roll I5bby a chain 45, traveling over sprockets on the outer of rolls I51) and I50. The inner roll I50 is the movable rolland is supported by arms c pivoted to the side plates I8, and spring urged clock-wise so as to cause the two rolls I normally to engage eachother.

crank 54, secured to the lower cam shaft 32,

which in turn is driven from the drive unit 38, as previously explained. Variations in feed may be obtained if desired by an eccentric stud (not shown) at one end of the rod, the angular position of which stud increases or decreases the crank circle. The latter mechanism is so constructed that upon clock-wise movement of sector 50, the four pairs of feed rolls I5, I5a, I51), and I50 are all rotated in a direction to feed a web therebetween downwardly the proper distance for one series of cutting operations by the cutting mechanism as will be later described. Upon return or counterclock-wise movement of sector 50, the feed rolls remain stationary due 1 to the over-riding of the one-way clutch 46.

: may accumulate between the press and drier.

This may be taken up by hand cranking the feed rolls at a higher rate of speed than the power rate. After the slack is taken up and proper tension obtained, the clutch is engaged or power turned on, and the power feed picks up from the hand feed.

To insure for more accurate feeding of the web by the intermittently operated feed rolls, and to prevent the momentum of the rolls from causing them to over-ride the one-way clutch at the end of the power stroke of the sector gear, the inner lowermost roll I50, carries a brake drum I50, which is engaged by a brake arm GI, spring urged into contact with the drum thus preventing any free and unwanted movement of the feed rolls. The brake arm BI, is automatically periodically released, so as to permit rotation of the feed rolls, by rotation of a lever 63, pivoted intermediate its ends at 64. The other end of the lever 63, carries a roller which engages a cam 66, carried by the lower stripper cam shaft 68, which in turn is driven by a chain 10, from the lower main cam shaft 32. Cam 66 is so shaped and timed as to release the brake just before the power stroke of the sector gear commences, and to gradually apply the brake just before the end of the power stroke and pre vent any over-running of the feed rolls and accurately controlling the movement thereof. Thus the brake mechanism in combination with the accurately adjustable feeding mechanism produces an extremely accurate control of the feed of the web.

To facilitate insertion or threading of the web with the machine stationary and in open die position means are provided for releasing the brake to permit hand cranking of the machine. This means consists of a crank 90 pivoted at ill and carrying a wedge 92. When the crank is rotated clockwise wedge 92 enters between the cam 65 and the cam roller rocking lever 63 counterclock-Wise to release the brake. When the machine is again operated under power a small lug 93 on the cam 56 strikes the lug 92 and removes it from between the cam and the cam roller thus restoring the brake to automatic operation.

From the foregoing, it will be understood that the web to be cut is led from the carding machine through the starcher, drier, draw rolls, tension rolls, and feed rolls II, in a continuous manner, which continuous feed is converted to an intermittent feed by rolls I5, Ia, I53), andI5c, by which the web is fed through the machine and the remainder into the suction pipe I1. During the intermittent periods when the web is stationary the cutting of the discs takes place.

Cutting mechanisms The cutting of the discs takes place in two stages of successive cuts, i. e., first a series of three discs are cut out successively across the width of the web and immediately thereafter a second series of three discs are cut successively and in staggered relation to the first three discs across the width of the web. It has been found slightly preferable to so arrange the cutting of the discs that each of the six discs out from the web are cut successively over a short period of time all within the stationary period of the web rather than in a succession of groups of cuts and much preferably to cutting all discs in one single cut. The mechanism for cutting the discs from the web of material will now be described.

The illustrated machine has provision for diecutting six discs from the web of carded material as it is passed between rollers I5a, I5b and I 50. Three discs are cut, preferably in rapid succession, with their centers upon a common. horizontal line extending midway between and parallel to rollers I5a, and I5b, during that period when the web is stationary, betwen feeding movements. A second series of three discs is cut by a second but similar set of dies and associated mechanisms, also preferably in succession and with the centers of the discs arranged on a common horizontal line midway between and parallel to rolls I5b and I5c. These latter discs are preferably cut a little later in the cutting cycle than the cutting of the first three discs and furthermore are arranged in staggered relation to the first three discs both vertically and horizontally as is clearly shown in Figure 2.

The mechanism for cutting these discs from the web is of the type employing a, stationary cylindrical die and a movable anvil although it is conceivable that the reverse order could be employed. The mechanism for cutting the upper three discs is similar to that for cutting the lower three discs, therefore the upper series only will be described in detail. As can be seen particularly from Figs. 3 and 4, there are provided three cylindrical horizontally arranged upper die holders IIJI, carried by a horizontal rigid upper and outer bolster plate I03. The die holders are preferably threaded and adjustably retained within the bolster plate by means of inner and outer adjusting nuts I05. The cutting edge of the die is preferably made of a separate and removable insert I01, fitted into the end of the die member HM, and detachably held thereto by a lock ring I03.

Operatively associated with each of the dies I BI is an oscillating anvil. t is preferred to mount each anvil independently in order to provide for separate adjustment of each anvil relatively to its die although the three anvils may be carried by common support and operated as a unit from a single cam, if desired. As illustrated, each anvil is carried by an arm I I5, pivoted about a horizontal axis I I1, above the dies, and offset from the plane of the cutting edge of the knife portion I01, of the die IilI, for reasons which will appear more clearly hereafter. The lower end of the arm which carries the anvil is provided with a pair of rollers I I 9, which engage a pair of cam I2I, carried by the upper main cam shaft 21, and is retained in engagement therewith by a tension spring I23, secured to the arm H5, and the bolster plate 29. The cams IZI,

are so arranged and timed that the arm I I 5, and I the anvil carried thereby, is moved into engagement with the cutting die during that period in the cycle of operation when the web is stationary and held taut by the rolls I I5a, and I I 51), i. e., between feeding movements.

The anvil is carried by the lower end of arm I I 5, in such a, manner as to permit universal adjustment of the anvil relatively to the cutting die and for this purpose is supported upon a dome-shaped base I25, rigidly secured to the.

lower end of arm H5, and comprises a cap or anvil block I21, having an under concave surface or socket, shaped to fit the dome-shaped base and to permit universal adjustment of the anvil to bring the outer die abutting face thereof in exactly the same plane as the plane of the die. The anvil block I21, is frictionally retained in contact with the base I25, by means of studs I29, (Figs. 5 and 6) projecting outwardly from the base member I25, and through the annular portion of the anvil block I21, in conjunction with springs I3I as shown in Fig. 5. The anvil block I21, is preferably provided with a hardened annular insert or anvil ring I33, seated within a groove formed within the outer face of the anvil holder and retained therein by a locking ring I34, in position to engage th annular cutting die I 01. Anvil ring I33, may be cushioned within the anvil block I21, by means of a, resilient seating ring I35, to permit minuteand final adjustment of the anvil relatively to the die, as the two engage each other, and also to take up the shock of impact as the anvil strikes the die.

From the foregoing construction it will be obvious that complete and accurate adjustment of the anvil relatively to the die is permitted and assured. In other words, cutting contact between the anvil and the entire cutting edge of the circular die is permitted and in fact caused whereby the thin tenuous web of fibrous material usually cotton, is cleanly out upon contact of the anvil with the die.

As previously described, the die supporting arm H5, is pivoted about a point Ill, offset from the plane-of the cutting edge of the die [01. This offset distance is slightly greater than the thick ness of the anvil and block, 1. e., it is not merely an offset to compensate for the thickness of the anvil. Because of this construction, the anvil approaches the die through an arcuate path or compound movement having a component substantially normal to the plane of the die and a component inclined thereto and somewhat parallel to the plane of the web. The result is that although the anvil strikes the die squarely throughout the entire cutting edge of the die as the anvil first engages the die, the rubber insert yields slightly and there is a slight additional movement of the anvil along its arcuate path producing a slight wiping, or, in effect, combination cutting and tearing action of the anvil after it first strikes the die. Thi latter movement which is in addition to the movement of the anvil toward and from the die separates the cut disc from the web thus assuring absolute clean-cut separation of the fibers after engagement of the anviland die and eliminates any pulling action or raveling of the fibers as the discs are separated from the web.

In the preferred embodiment of this invention there is a separate arm H5, pair of cams l2l, and anvil mechanism for each die I01, and the cams l2i, for the three upper anvils and associated dies are so arranged on shaft 27 that their high points are approximately 10 degrees apart from each otheigthus each anvil is actuated at a little different period in the cycle of cutting operation and the operating load is distributed throughout the cutting cycle rather than being concentrated at one point. This tends to provide for a smooth operating machine having less vibration, shock, and strain upon the motor. It further permits of individual adjustment of each anvil to its associated die without affecting the setting of the other anvils and die.

discs iiiia are three anvil mechanisms i210. cari.

ried by arms i i5a pivoted below the dies at I Fla. and at a point offset from the plane of cutting as explained in connection with the upper group of anvils. It is also preferred that these lower anvils be operated successively by cams lZia. as described in connection with cams l2l and also successively with relation to the upper cams I2! so that the load and shock caused by the lower cams is spread over the cycle of cutting operation, while the web is stationary between feeding movements. As shown in Figures 2 and 3, the lower dies it la are staggered so as to come in between the upper dies both laterally and vertically, thus permiting an extremely close grouping of the discs and minimizing the waste of web material. By spacing the lower dies an appreciable distance below the upper dies and operating the upper dies prior to the lower'dies, sufficient web material remains after the first three discs are cut to permit proper feedin of the web by the web itself and proper holding of the web while the second series of three discs is being died-cut.

Stacking mechanism A stripper mechanism is provided for positively ejecting the cut discs through the center of the die and stacking them. The ejector mechanism comprises a plunger 150, which projects through the center of the anvil and is connected to one arm of the three-armed lever B52, pivoted at 554, and urged counterclock-wise by spring I56, attached to the second arm of the lever. The third arm of the lever carries a roller which engages a cam I58 carried by the shaft 25. While the plunger I59 could be actuated from the main cam shaft 2'! it has been found preferable to drive the plunger from the upper shaft 25 to avoid congestion on shaft 27 and to give better control of the stripper mechanism. Cam I 58 is so arranged and timed that plunger use is actuated to push the cut disc into the interior of the die immediately after it is cut by the anvil, and prior to the succeeding feeding movement of the web.

As the cut discs are discharged through the die they pass out on to a half circular rack 5653, where they are stacked and may be collected and removed at will.

There is a stripping mechanism and discharge rack for each of the associated upper anvils and dies, and also a stripping mechanism (not shown) for each of the lower anvils which discharges the cut discs through the die out through racks Ifiiia.

Counting mechanism In manufacturing filter discs of the tenuous material commonly used and contemplated being out in the machine of this invention, it is desirable, although difficult, to count the discs after they have been cut, particularly at the speed at which the discs are cut.

For this reason a counting and indicating mechanism has been embodied in the machine which inserts an indicating medium such as a strip of paper into the stack of out discs, after a predetermined number has been cut, as they are being discharged through the die, thus facilitating packaging of the discs after they are cut from the web. For this purpose a roll of paper tape I10, is supported above each die in position to be fed between a pair of feed rolls Hi2 (Fig. 4) thence through a sheet metal paper guide and over the cutting edge of the die IN. The upper roll is driven by a chain El i (Fig. 4) from a shaft I75, which functions as a line shaft for three paper feeding mechanisms located on the upper bolster plate. Shaft H5 i driven by a chain I16 (Figs. 3 and 4) from another shaft l15=a which functions as a line shaft for three paper feeding mechanisms located on top of the lower bolster plate. When shaft i'i5a is rotated a fraction of a turn, all six paper feeding mechanisms are actuated and eject a short piece of paper therefrom.

[Ella and stroke of the connecting rod I18, driving a chain I85, around an idler sprocket I86, spaced far enough away to allow for the number of chain links desired, this being the number of discs to be counted or indicated. The other pawl I 8| is normally held out of engagement with the ratchet I83, by a spring. The ratchet I83 is fixed to the shaft I15a and when it is engaged by pawl IBI, it will turn the shaft I15 and actuate all of the paper feeding mechanisms.

The engagement of the pawl I M with the ratchet I83 is brought about at the proper in tervals by a small roller I83, carried by an extended chain pin of the chain I85, which roller engages a laterally projecting lug on the pawl NH, and forces the pawl into engagement position with the ratchet. According to the number of links on the chain and the number of teeth on the ratchet the feed rolls I12 will be operated to feed a length of paper tape along with the web of material being cut so that upon the next cutting operation the tape will be cut and left projecting into the pile of discs. If the paper tape is of some readily distinguishable color, it will appear very plainly as the discs are discharged through the die and on to the racks I60, thus indicating any desired number of discs. It will be understood that there is also a counting mechanism as described, for each of the lower dies, a portion of which latter mechanism is shown at IIZIa (Fig. 3).

From the foregoing, it is believed to be ap parent, particularly to those skilled in the art that there has been provided a method and machine capable of cleanly cutting and stacking,

discs from a relatively wide web of flimsy, tenuous material in a continuous operation and with a minimum of waste. It will also be readily understandable that when such a machine is used in connection with a series of devices as described complete processed, starched, and counted discs can be provided by a continuously operable system in an economical and efiicient manner.

It will be obvious to those skilled in the art that minor deviations and variations may be made from the apparatus and method disclosed without departing from the spirit and scope of the invention as defined in the appended claims.

I claim:

1. The method of forming filter discs which comprises the steps of, intermittently feeding a web to a series of cutting dies, and successively cutting a series of discs with said dies while the web is stationary between each feeding movement. I

2. The method of forming a filter disc from a web of material which comprises the steps of, intermittently feeding a web of material to a plurality of series of cutting dies, successively cutting a series of discs from said web of material while said web is stationary between feeding movements, and thereafter cutting a second series of discs successively in staggered relation to said first discs also while said web is stationary between feeding movements.

3. The method of forming filter discs which comprises the steps of, constantly feeding a web of material to a cutting machine, converting said feed to an intermittent feeding movement to a series of cutting dies, successively cutting a series of discs with said dies from said web while the latter is stationary between each feeding movement, and thereafter discharging the cut discs and scrap web.

4. The method of forming filter discs which comprises the steps of, intermittently feeding a formed, treated, and dried web to a series of cutting dies; cutting a series of discs from said web while said web is stationary; and thereafter discharging said discs and scrap web from said machine.

5. The method of forming filter discs which comprises the steps of, intermittently feeding the formed, treated, and dried web to a series of cutting dies; cutting a series of discs from said web in succession while said web is stationary between feeding movements; and thereafter discharging the cut discs and scrap web from said machine.

6. The method of forming filter discs which comprises the steps of constantly feeding a carded web to a diecutting machine, intermittently feeding said formed web to a plurality of series of cutting dies, cutting a series of discs from said web while said web is stationary,thereafter cutting a second series of discs from said web while said web is stationary between feeding movements and in staggered relation to said first series, and discharging said discs and scrap web from said machine.

7. The method of forming filter discs which comprises the steps of, constantly feeding a carded web to a diecutting machine, intermittently feeding said formed web to a plurality of series of cutting dies, cutting a series of discs from said web in succession while said web is stationary between feeding movements, thereafter cutting a second series of discs from said web successively and in staggered relation to said first series while said web is stationary between feeding movements, and discharging said discs and scrap Web from said machine.

8. The method of forming filter discs from tenuous sheets of material which comprises the steps of, holding a web at two spaced points and cutting the web while so held by moving a cutting means into contact with said web in a direction normal to the plane of said web between said spaced points and also in'a direction other than normal to the plane of said web after contact with said web.

9. The method of forming circular filter discs from tenuous sheets of material which comprises the steps of, supporting a web at two spaced points and cutting the web while so held by moving a circular cutting means into engagement with said web through an arcuate path.

10. The method of forming filter discs from thin tenuous webs which comprises the steps of, intermittently feeding a web to a cutting knife to be cut thereby when said web is stationary between feeding movements, holding said web between two spaced points, and moving the cutting knife toward said web through an arcuate path about an axis which is without the plane of said web between said two points. Q

11. The method of forming circular filter discs from thin tenuous webs which comprises the steps of feeding the web to a circular cutting knife, holding the web, moving the cutting knife toward said web and causing it to engage the web with a movement having a component substantially normal to the plane of the web where supported and a component diverging from said normal component.

12. The method of forming filter discs from a thin tenuous web of material which comprises the steps of, feeding a web of material to a cutting mechanism, interrupting the feed movement of said web momentarily, cutting a series of discs successively from said web at each interruption of said feed, discharging the scrap material, and stacking the cut discs.

13. A machine for cutting discs from a filmy, tenuous web comprising two sets of intermittently driven feed rolls for feeding a web through said machine, a series of cutting dies and associated anvils arranged between said sets of feed rolls, and actuating means operable to move said series of dies and anvils together in succession to cut discs from the web therebetween while said web is stationary.

14. In a machine for cutting discs from a filmy, tenuous web in combination, constantly driven feed rolls for receiving the web, two sets of spaced and intermittently driven feed rolls for feeding said web through the machine, a common driving medium for driving said constantly and intermittently driven rolls, a series of cutting dies and associated anvils arranged between the two sets ofintermittently operated feed rolls, and actuating means operable to move said dies and anvils together to cut discs from said web while said web is stationary between feeding movements.

15. In a machine for cutting discs from a filmy, tenuous web, in combination, feed rolls for receiving a web, driving means for continuously operating said feed rolls, sets of spaced feed rolls for feeding the Web through said machine, a oneway clutch for operating said latter feed rolls, and means driven by said driving means for intermittently operating said one-way clutch to intermittently drive said sets of feed rolls, a series of cutting devices and associated anvils arranged between the sets of intermittently operated feed rolls, and actuating means operable to move said dies and anvils together to cut discs from said web while the latter is stationary between feeding movements.

16. In a machine for cutting discs from a filmy, tenuous web, in combination, sets of spaced feed rolls for feeding the web through said machine, driving means for'intermittently operating said feed rolls, a series of cutting dies and associated anvils arranged between the sets of intermit-;

tently operated feed rolls, actuatin means operable to move said dies and anvils together to cut discs from said web while the latter is stationary between feeding movements, a trough for receiving the cut discs, and means for inserting slips of material between the cut discs, after a predetermined number of discs have been cut.

1'7. A machine for cutting discs from a filmy,

tenuous web comprising a plurality of sets of intermittently driven feed rolls, a plurality of series of cutting dies and associated anvils arranged with one series between adjacent sets of feed rolls, and actuating means operable to move said series of dies and anvils together successively to cut discs from said web while said web is stationary between intermittent feeding movements. 7

18. In a machine for cutting discs from a filmy, tenuous, fibrous web, in combination, a plurality of sets of intermittently driven'feed rolls for feeding a web through said machine, a plurality of series of cutting dies and asociated anvils arranged with a series thereof between adjacent sets of feed rolls, and actuating means operable to move each of said dies and its associated anvil together successively to cut discs from said web while said web is stationary between intermittent feeding movements.

19. In a machine for cutting discs from a thin, filmy, tenuous web, cutting members comprising a die and a cooperating pivoted anvil adapted to be moved into contact with said cutting edge, the pivotal point of said anvil lying without the plane of said cutting edge whereby said anvil engages said cutting die with an arcuate tearing and cutting movement and resilient means carried by one of said cutting members and cushioning said member.

20. In a machine for cutting discs from a thin, filmy, tenuous web, in combination, cutting members comprising a cylindrical die having a circular cutting edge lying within one plane, a pivoted arm mounted for swinging movement toward and from said die and an anvil carried by the free end of said arm in position to engage the cutting edge of said die, the pivotal point of said arm lying without the plane of said cutting edge, whereby said anvil engages said cutting die with a movement in a direction substantially normal to the plane of said die and also in a direction other than that normal to the plane of said die to sever and separate the cut discs from the web and resilient means carried by one of said cutting members for cushioning said member.

21. In a machine for cutting discs from a filmy, tenuous web, in combination, a cylindrical die having a circular cutting edge, a pivoted anvil mounted for movement toward and from said die, said anvil being supported for universal adjustment with respect to the plane of said circular cutting edge, and a resiliently mounted contact ringcarried by said anvil in position to engage the cutting edge of said die.

22. In a machine for cutting discs from a filmy,

' tenuous web, in combination, a cylindrical die having a circular cutting edge, a pivoted arm movable toward and from said die, an anvil carried by said arm in position to engage said die, an adjustable ball and socket connection between said arm and said anvil to provide a frictionally resistant universal adjustmentbetween said anvil and said die, a contact ring carried by said anvil in position to engage the cutting edge of said die, and a resilient member between said anvil and said ring.

PAUL KORSGAARD. 

